Abstract:
:We report the case of a left-handed man (MCR), who presented with a peripheral agraphia as an early sign of multiple sclerosis. His left-handed writing was neologistic, whilst oral spelling, typing and spelling with the right hand were intact. Structural MRI scanning revealed a lesion of the body of the corpus callosum. Dichotic listening tests indicated that MCR displayed left hemisphere dominance for language. It is proposed that MCR represents a case of a disconnection syndrome in which right hemisphere systems that provide the basis for movement templates during left-handed writing are isolated from left hemisphere language systems. Analysis of left-handed writing indicated that peripheral movement control was highly structured with both individual letter frequency and sequential dependencies between letters represented within these motor control units. This case represents an opportunity to explore the mechanisms of movement control for writing and to examine the characteristics of isolated letter templates.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Varley R,Cowell PE,Gibson A,Romanowski CAdoi
10.1016/j.neuropsychologia.2004.12.011subject
Has Abstractpub_date
2005-01-01 00:00:00pages
1503-13issue
10eissn
0028-3932issn
1873-3514pii
S0028-3932(05)00014-Xjournal_volume
43pub_type
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